Device for spraying paint and other liquids



Jan. 23, H923.

F. R. LONG. DEVICE FOR VSPRAY ING PAINT AND OTHER LI aUIDs.

l 1920, v2 SHEETS-SHEE l FILED JAN. 2,`

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Jam. 23. 3922?. F. R. LONG.

DEVICE FOR SPRAYINC PAI-NT AND OTHER LloUlDs.

2 'SHEETSSHEET 2 FlLED'JAN. 2. 1920.

illlatenteduallan. 23, 1923 aaai saveur tossica.

FREDERICK R. LONG, OF BERWICK, PENNSYLVNIA, ASSIGNOR TO AMERICAN CAR lAND FOUNDRY COMPANY, F

NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DEVICE FOR SPRAYING PAINT AND OTHER LIQUIDS.

Application led January 2, 1920. Serial No. 348,752.

To all whom it may concern Be it known that I, FREDERICK R. LONG.,`

residing at Berwick, Columbia County, State of Pennsylvania, and being a citizen of the United States. have invented certain new and useful Improvements .in Devices for Spraying Paint and Other Liquids, of `which the following is a full, clear, and eX- act description, such as will enable others skilled in the art to which it appertains to make and to use the same, reference being had to the accompanying drawings, which illustrate'the preferred form of the invention, though it is to be understood that the l5 invention is not limited to the exact details of construction shown and described` as it is obvious that various modications thereof within the scope of the claims will occur to persons skilled in the art.

In said drawings:

Figure 1 is a longitudinal vertical section through the device illustrating the parts in their normal or inoperative position;

.Figure 2 is a front elevational view of the apparatus;

Figure 3 is a vertical section taken on line 3-3, Fig. 1, looking in the direction indicated by the. arrow, through the rear chamber of the sliding valve;

Figure 4 is a similar view taken on line 4-4 of Fig. 1 looking'in the direction indicated b v the arrow and showing the relative positions of the parts carried by the sliding valve vin the vicinity of the air inlet in the valve;

Figure 5 is a vertical section taken on line 5-5 of Fig. 1 looking in the direction indicated by the arrow and toward the nozzle of the device; Figure 6 is a section similar to Figiu'e 1 showing the `slide valve slightly advanced with its air port in partial communication with the air supply and its liquid port still closed; and

Figure Tis a view similar to Figure 6 with the slide valve further advanced and both air and liquid ports registered with the ports leading to respective sources of sup` Plvi The object of the invention is to provide a device for spraying paint or other liquid forusein painting or nishing operations. vThe preferred embodiment may be in the form illustrated in the drawings showing a 55 casing or framing made up of any suitable material. preferably aluminum on account of its light weight. Such framing is shaped for convenient handling and comprises a number of compartments, the uppermost of which forms a housing 1() for the reciprocating parts of the device while the portion depending from the housing serves as a handle 11 for the apparatusY and is chambered to provide conduits or compartments 12 and 13 leading respectively to the sources of air and liquid supply. A partition 14 separates compartment-s 12 and 13 from the interior of housing 10% communication be tween said conduits and housing being established throughl the medium of ports 15 and 16 the opening and closing of which are controlled by means of a unitary sleeve valve hereinafter to be described. said ports leading respectively to air and liquid conduits. lVithin the housing 10 is fitted a wearing sleeve or bushing 1T designed to receive the sliding valve referred to and also provided with port holes forming continuations of ports 15 and 16.

eciprocating within the housing is a slide valve 1S acting a unit to control both air and liquid ports 15 and 16 respectively and to successively open and close said ports. the relative positions of the ports being such that while the opening and closing of the same are effected successively, in one position of the slide valve both ports are open to insure simultaneous flow of air and liquid and are closed upon return of the slide valve to normal position. This result is achieved by means of slide valve ports 19 and 20 so spaced from each other and positioned relatively to respective ports 15 and 16 in the housing that during thev progress of the slide valve to open position` port 19 will first enter into communication with port 15 of air conduit 12 as shown in Figure 6 and a substantial flow of air established. after which port Q0 of the valve will connect with port 16 of liquid conduit 13 as shown in Figure 7 and permit simultaneous ilow of air and liquid. A reverse movement of the slide valve will first close liquid ports 16 and 20 as indicated in Figure 6 and finally the air ports 15 and 19 thus insuring complete evacuation of all liquid remaining in thc valve after closing of liquid ports. and a further movement in the same direction will carry the slide valve to the position shownin Fig- `ure 1 in which all commuiiication with the tively, and open to ,the atmosphere through air discharge tube 23 and liquid discharge tube 24 threaded respectively into chambers l 21 and 22. The tubes are concentrically arranged within the valve and reciprocate therewith as a unitv andtern'nnate 1n a nozzle' 25 fashioned to spray the liquidissuing therefrom. `Within the liquid tube 24 and extending alongits center is` arranged a rod 26 threaded into the rear wall 27 of liquid chamber 22 land provided with a chokling head 28 within the nozzle' opening dethe mass of the liquid at that pointso as to be more readily broken up into s ray formation. The choking head is slotte( 'at 29 to facilitate adjustment of rod 26 to regulate the supply. of liquid at the nozzle. T o keep choking head 28 properly centered within the nozzle, the rod 26 is supported intermediate its ends by any suitable; means which may take the form of a separate spider 26d encircling the rod and fitted within liquid tube 24.

Thenozzle end of the housing is closed by a. screw cap 30 perforated to receive the air tube 23 and adapted to confine the reciprocating parts within housing 10. For the purposev of restoring the slide valve to normal or inoperative position a spring 31 is employed to expand against abutments on the screw eap 30 and sleeve valve 18 and operates to yieldingly oppose an)- force tendsigned to reduce ing to move -the slide Avalve from its nor.

mal position.

Propelling mechanism for projecting the nozzle is mounted onrthe outside ot' the casing `and takes the forni of a trigger 3'.) fulcrumed at 33 to a bracket 34 on the casing and connected to the reciprmfating member in any suitable manner. ln the drawings. such connection is shown in the form ot' a pin 35 removabl mounted in the trigger 32 and lugs 36 on t 1e air tube-23. Where conditions are such as to insure against intel'- rnption in spraying operations` overlextended intervals of time.` the slide valve -18 may vbe set and locked at any stage of its range of movement to complete open position. by means outside ofthe casing an-d independent of the trigger mechanism. thereby relieving the operator of the strain required in keeping the trigger pressed back against the force exerted by the spring 31. A desirable form of locking and setting means is shown in the drawings comprising a set-screw 37 Lamela mounted at the rear of casing 10 and entering the interior thereof for engagement with the rear wall 27 of the slide valve. in lFigure 1 the set-screw 37 is set to the normal or inoperative position of the slide valve and is shown impinging the rear wall 27 of the valve to limit the rearward movement thereof under .the action of spring 31. The ac' position indicated in dotted lines in Figure 7 or in any other. position desired by means of a lock-nut 38 threaded on the set-screw and holding same against rotation. Provision against leakage is made in the joint 4between the slide valve 18l and bushing 17 by means of packing rings 39 fitted to the shde valve on opposite sides ot' the air and liquid ports. Leakage within the slide valve is guarded against by the threaded joints 40 and 41 on the -air and liquid tubes, respectively. In order to compress the packing rings 39 in the process of. assembling slide valve .and housing, and to permit the packing rings to enter the housing lreadily the front end of the bushing 17 is beveled or tapered as shown at 42.

In operation, thef-air and liquid are supplied to the device through their respective conduits 12 and 13 in the handle 11 of the apparatus. Pressure of the finger on trigger 32 will propel slide valve 18 and parts carried thereby and cause same to be projected as a unit until said valve has progressed to a point where air ports 15 and 19 register when the air will' commence to flow through conduit 12, ports 15 and 19 to the, valve interior thence throughq airtube 23 to nozzle 25 to the atmosphere. After the current of air is established, further projec- ,tion of the valve 18 Will cause registratlon slide valve will move in the reverse direction to normal or inoperative position at a certain stage vof which movement, liquid ports 16 and20 will be first to close, cutting of the liquid supply and permitting the already established air current to completely clear the apparatus of all liquid remaining 1n the casing andv valve thereby keeping the nozzle clear of said liquid which if allowed to remain would congeal and harden in the nozzle. From this it follows that a further rearward movement would 'carry the valve.

' ing and closing theair and liquid ports, and

that the valve Willoperate to open the air ports first and close them last; that the air and liquid tubes, together with choking-rod 26, are carried by the slide valve and move with same as a unit; that all ot' the valve movements are directed by a single mechanism positioned Wholly outside the casing and reciprocating parts.

'VVhatI claim is:

l. In mechanism ofthe class described, the combination with a -casing comprising a valve housing and air and liquid compartments, of a reciprocatory valve within said communication housing adapted to establish communication With said` air and liquid compartments and a spray nozzle adapted to be reciprocatedin unison with said valve.

2. In mechanism of the class described, the combination with a casing comprising a valve housing and air and liquid compartments, of a reciprocatory valve Within said housing adapted to successively establish with said air and liquid compartments and a spray nozzle adapted to be reciprocated in unison with said valve.

3. In mechanism of the class described. the combination with a casing comprising l a valve housing and air and liquid compartments, of a reciprocatory sleeve valve Within the housing, air and liquid tubes .carried by said valve, said valve being adapted to successively establish communication between said ments.

4. In mechanism of the class described, the combination with a casing comprising a valve housing and air and liquid co-mpartments, of a chambered reciprocatory valve Within the housing` concentrically arranged air and liquid tubes carried by the valve and opening into said chambers, said vali/'e being adapted to establish communication between said tubes and comparttubes andv compartvments. 1

5. In mechanism of the class described, the combination with a casing comprising a Valve housing and air and liquid compartments, ports in the housing opening into said compartments, of a reciprocatory valve in said housing adapted to successively open and close. said ports and a spray nozzle carried by said valve.

6. In mechanism of the class described, the combination with a casing comprising beyond said housing.

a valve housing.and air and liquid compartments, ports in the housing'opening into said compartments, of a reciprocatory valve in said housing adapted to successively open and close said ports. discharge tubes carried by said valve and projecting and means for controlling the movements of said valve mounted outside the casing and connected to one of'said tubes.

`7. In mechanism ot' the class described. a reciprocatory valve comprising a hollow sleeve having air and liquid receiving chambers, concentrically arranged tubes carried by the valve and opening into said chambers, a housing tor said valve connected with sources of air and liquid supply, and means outside of Said housing for moving said valve to establish communication between 'the chambers ot said valve and respective sources ot supply.

H. In mechanism ol the class described. a reciprocatory valve, a housing for the valve, said housing being connected with sources of air and liquid supply. said valve being adapted to establish communication between said housing' and sources of supply and a spray nozzle carried by said valve.

9. In a mechanism of the class described, a reciprocator.y valve having air and liquid receiving chambers', a housing Jor said valve, concentrically arranged discharge tubes eX- tending into the housing and moving with said valve, the chambers of the valve opening respectively into one ot' said tubes, sourcs of air and liquid supply, means outside of said housing connected with one of said tubes for moving said valve in a direction adapted to establish communication between said tubes and sources ot supply. and resilient means within the housing operating to restore said valve to inoperative position.

l0. In a mechanism of the class described, a valve housing, a reciprocatoryv valve. a rcmovable cap tor said housing provided with anopening, a member carried by said valve and extending through the opening in said cap, a spray nozzle carried by said member. controlling means outside oi said housing connected with said member tor moving said 'alve in one direction, and resilient means within the housing operating to restore said v alve to inoperative position.

ll. Ina mechanism oi the class described. a casing comprising a valve housing and air and liquid compartments. ports in the housing opening into said compartments, a

reciprocatory valve within the -housing caradapted to llO 12. In mechanism of the class described, a casing comprising a valve housing and air and liquid compartments, a reciprocatory valve Within said housing'adapted to successively establish connnunicationl With said compartments, a spray nozzle carried -by said valve, and valve reciprocating 'mechanism outside of said casing.

13. In mechanism of the class described, a casing comprising a valve housing and air and liquid compartments, a reciprocatory valve Within said housing adapted 4to successively establish communication with said compartments, valve reciprocating mechanism outside of said casing, and valve setting means.

14. Ina mechanism of the class described, a casing having ports therein, a chambered valve adapted to connect said ports and chambers, discharge tubes carried by said valve and connected to said chambers and` a spray 'nozzle carried by said tubes.

15. In a mechanism ot' the class described,

a casing having ports therein, and a valve having a plurality of chambers adapted to connect said ports and chambers and conthe return of the valve to its inoperative position. i l

17. In a mechanism of the class described,

a casing having air and liquid supply rports therein, a valve having air and liquid chambers adapted to connect said chambers to said ports andfconcen'trc discharge passages .extending lt'rom said chambers and a 'spray nozzle carried by said valve.

In Witness whereof I 4have hereunto set my Ahand 1n the presence of two Witnesses.

FREDERICK R. LONG.

Witnesses:

LEONARD IV. SULT, A. D. MCCLINTOGK. 

